opener: force copy on 'a'ppend if nlinks() returns 0 (
issue1922)
If pywin32 is not installed, 'os.lstat(pathname).st_nlink' is used for
nlinks(), which is always zero for all files on Windows.
To make sure we break up hardlinks if pywin32 is missing, we force
nlink = 2 if nlinks() returns < 1.
(this completely fixes
issue1922)
$ hg init
$ touch unknown
$ touch a
$ hg add a
$ hg ci -m "1"
$ touch b
$ hg add b
$ hg ci -m "2"
Should show unknown
$ hg status
? unknown
$ hg revert -r 0 --all
removing b
Should show unknown and b removed
$ hg status
R b
? unknown
Should show a and unknown
$ ls
a
unknown